Finding the Fourth Proportional to 121,115.10, 181,780.65 and 71,132.70
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Solution
The fourth proportional to 121,115.10, 181,780.65 and 71,132.70 is: 106,762.48
Step by Step Solution
- Step 1: Write the proportion equation
121,115.10 : 181,780.65 = 71,132.70 : x - Step 2: Convert to fraction form
121,115.10/181,780.65 = 71,132.70/x - Step 3: Cross multiply
121,115.10x = 181,780.65 × 71,132.70 - Step 4: Simplify right side
121,115.10x = 12,930,548,442.26 - Step 5: Solve for x
x = 12,930,548,442.26/121,115.10 - Step 6: Final answer
x = 106,762.48
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.